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Issue 38, 2014
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On the scaling behavior of electric conductivity in [C4mim][NTf2]

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Abstract

In this work we examine, for the first time, the molar conductivity behavior of the deeply supercooled room temperature ionic liquid [C4mim][NTf2] in the temperature, pressure and volume thermodynamic space in terms of density scaling (TVγ)−1 combined with the equation of state (EOS). The exponent γσ determined from the Avramov model analysis is compared with the coefficient obtained from the viscosity studies carried out at moderate temperatures. Therefore, the experimental results presented herein provide the answer to the long-standing question regarding the validity of thermodynamic scaling of ionic liquids over a wide temperature range, i.e. from the normal liquid state to the glass transition point. Finally, we investigate the relationship between the dynamic and thermodynamic properties of [C4mim][NTf2] represented by scaling exponent γ and Grüneisen constant γG, respectively.

Graphical abstract: On the scaling behavior of electric conductivity in [C4mim][NTf2]

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Article information


Submitted
22 May 2014
Accepted
11 Aug 2014
First published
12 Aug 2014

Phys. Chem. Chem. Phys., 2014,16, 20444-20450
Article type
Paper
Author version available

On the scaling behavior of electric conductivity in [C4mim][NTf2]

Z. Wojnarowska, G. Jarosz, A. Grzybowski, J. Pionteck, J. Jacquemin and M. Paluch, Phys. Chem. Chem. Phys., 2014, 16, 20444
DOI: 10.1039/C4CP02253J

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